1201.1394 (Armen Sedrakian)

Vertex renormalization of weak interactions in compact stars: beyond leading order    [PDF]

Armen Sedrakian

Neutrino emission rate from baryonic matter in neutron stars via weak neutral vector interaction is computed up to order O(v_F^6), where v_F is the Fermi velocity in units of speed of light. The vector current polarization tensors are evaluated with full vertices which include re-summed series in the particle-hole channel. The neutrino emissivity is enhanced compared to the O(v_F^4) order up to 10% for values v_F < 0.4 characteristic to baryons in compact stars.

View original: http://arxiv.org/abs/1201.1394